Method 2: Update your .htaccess file

1) FTP to your root directory. This the location where your wp-admin and wp-content directories reside. There, you shoul see a file named .htaccess. If you don’t see it, make sure your FTP client settings show hidden files (check your FTP preferences for this setting).

2) Open .htaccess file.

3) At the very top of the file, add these lines (you can change the 64 to whatever number you desire):

php_value upload_max_filesize 64M
php_value post_max_size 64M

IMPORTANT: Do NOT delete or add anything else in the .htaccess file

4) Save file and re-test your WordPress site.

I hope this helps out those users needing to increase their WordPress file size upload limit. If it does or doesn’t, just let me know in the comments.